Add initial rules and blocklist for Sakha language

[gaydmi]

This is an adaptation of the Belarusian rules to Sakha.

    How many sentences did you get at the end?

14786 sentences.

    How did you create the blocklist file?

As the dataset is quite small, the frequency threshold is set to 1. Mostly, the filtering was done

    Get at least 3 different native speakers (ideally linguists) to review a random sample of 100-500 sentences and estimate the average error ratio and comment (or link their comment) in the PR.

I've sampled 300 sentences randomly and split them into 3 samples of 100 sentences each.

As I'm not a native speaker of Sakha myself, I've contacted some members of Common Voice Sakha community.
The results could be found here:
Sample 1
Sample 2
Sample 3

So, the error rate is less than 5%.